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Resting Salivary Levels of IgA and Cortisol Are Significantly Affected During Intensive Resistance Training Periods in Elite Male Weightlifters

Tsai, Min-Lung1; Li, Tzai-Li2; Chou, Li-Wei3; Chang, Chen-Kang4; Huang, Shu-Yi1; Fang, Shih-Hua1

Journal of Strength & Conditioning Research: August 2012 - Volume 26 - Issue 8 - p 2202–2208
doi: 10.1519/JSC.0b013e31823a4246
Original Research

Abstract: Tsai, M-L, Li, T-L, Chou, L-W, Chang, C-K, Huang, S-Y, and Fang, S-H. Resting salivary levels of IgA and cortisol are significantly affected during intensive resistance training period in elite male weightlifters. J Strength Cond Res 26(8): 2202–2208, 2012—The aim of this study was to investigate the cumulative effects of intensive resistance training on salivary immunoglobulin A (SIgA) and cortisol responses in elite male weightlifters. Eleven elite male Taiwanese weightlifters were trained through 3 training stages before a national weightlifting competition, and this was followed by a 2-week recovery stage. Resting saliva samples were collected once in each of the 4 stages. Salivary concentrations of total protein (TP), SIgA, lactoferrin, and cortisol were measured. The results showed that (a) salivary TP concentrations were not significantly affected; (b) resting levels of SIgA, the ratio of SIgA to TP (SIgA/TP), cortisol, and the ratio of cortisol to TP (cortisol/TP) were significantly higher in the training stages than in the recovery stage; (c) a positive correlation was revealed between the ratios of SIgA/TP and cortisol/TP; and (d) the resting salivary lactoferrin concentrations and the ratio of lactoferrin to TP (lactoferrin/TP) were significantly lower in stage 1 than in the recovery stage. The findings in this study suggest that prolonged, intensive resistance training exerts cumulative effects on SIgA and cortisol responses in elite weightlifters.

1Institute of Athletics, National Taiwan College of Physical Education, Taichung, Taiwan

2Department of Sport Promotion, National Taiwan Sport University, Taoyuan County, Taiwan

3Department of Physical Medicine and Rehabilitation, China Medical University Hospital, Taichung, Taiwan

4Sport Science Research Center, National Taiwan College of Physical Education, Taichung, Taiwan

Address correspondence to Shih-Hua Fang, shfang@ntcpe.edu.tw.

© 2012 National Strength and Conditioning Association